phase-orchestration

name	phase-orchestration
version	0.1.0
description	Orchestrate multi-sprint phase execution as team-lead. Manages sprint waves, scrum-master lifecycle, PR merges, arch-ctm reviews, and integration branch strategy. This skill is for team-lead only, not for scrum-masters.
depends_on	{"scrum-master":"0.x","rust-developer":"0.x","rust-qa-agent":"0.x","req-qa":"0.x","rust-architect":"0.x"}

Phase Orchestration

This skill defines how team-lead orchestrates a development phase consisting of multiple sprints with dependency-aware parallelism.

Audience: team-lead only. Scrum-masters have their own process defined in .claude/agents/scrum-master.md.

Prerequisites

Before starting a phase:

1. The phase plan exists in docs/project-plan.md or a linked phase document.
2. The integration branch integrate/phase-{N} exists and is up to date with develop.
3. The Claude/ATM team is active.
4. arch-ctm is running and reachable via ATM CLI.

Phase Execution Loop

1. Build the sprint dependency graph

Read the phase plan and identify:

• sprint dependencies
• parallel waves
• merge order within each wave

2. Execute sprints

For each sprint, respecting dependency order:

a. Spawn a fresh scrum-master

Each sprint gets a fresh scrum-master. Do not reuse scrum-masters across sprints.

{
  "subagent_type": "scrum-master",
  "name": "sm-{phase}-{sprint}",
  "team_name": "<team-name>",
  "model": "sonnet",
  "prompt": "<sprint prompt>"
}

Critical rules:

• subagent_type must be scrum-master
• name is required
• team_name is required
• scrum-master is a coordinator only
• scrum-master must not write code, run tests, or implement fixes itself

b. Sprint prompt template

The sprint prompt should include:

• phase and sprint id
• sprint title
• plan and requirements references
• worktree location
• branch name
• PR target
• reminder that scrum-master is a coordinator only

c. Monitor progress

• scrum-masters report completion or escalation to team-lead
• if a scrum-master reports sub-agent spawn failure, investigate and advise
• if a scrum-master escalates architecture risk, spawn rust-architect

3. Post-sprint: CI gate and merge

After each scrum-master reports completion:

1. before QA-1, require arch-ctm to run a self-directed Rust best-practices sweep on the integration branch using the planned QA-1 review targets and fix all findings found there
2. verify QA passed
   • QA-1 includes the Rust best-practices review
   • QA-2 and later rounds must omit Rust best-practices review entirely
   • unresolved QA-1 RBP findings not fixed in the first fix round carry to the next phase backlog instead of being re-raised in later rounds
3. wait for CI green
4. merge PR to integrate/phase-{N} in dependency order
5. update the integration branch

4. Post-sprint: arch-ctm design review

After every sprint PR is merged to integrate/phase-{N}, request an arch-ctm review via ATM CLI. Do not block the next eligible sprint unless arch-ctm reports critical blocking findings.

5. Fix sprint if needed

If arch-ctm finds issues:

1. create a new worktree from integrate/phase-{N}
2. let arch-ctm or a fresh scrum-master execute the fixes
3. run rust-qa-agent and req-qa before merge

6. Wave transitions

Before starting the next wave:

1. all prerequisite sprints must be merged
2. integration branch must be current
3. critical arch-ctm findings must be addressed first
4. new scrum-masters start from the updated integration branch

7. Phase completion

After all sprints merge:

1. perform any phase-end version or release prep required by the plan
2. create PR integrate/phase-{N} -> develop
3. wait for CI green
4. merge after user approval
5. shut down remaining scrum-masters
6. do not clean up worktrees until user review

Scrum-Master Lifecycle

• fresh per sprint
• named tmux teammate
• can spawn background sub-agents
• shut down after sprint completion
• never does dev work

Team Lifecycle

• team persists across phases
• scrum-masters are ephemeral
• arch-ctm is persistent and communicates via ATM CLI

ATM CLI Communication

Use ATM CLI for arch-ctm:

atm send arch-ctm "message"
atm read
atm inbox

Use tmux nudges when required by the local runtime setup.

Anti-Patterns

• do not use rust-developer as the scrum-master subagent type
• do not tell scrum-masters to do dev work themselves
• do not do dev or QA work as team-lead
• do not skip post-merge arch-ctm reviews
• do not merge without QA pass and CI green
• do not reuse scrum-masters across sprints